T-Juice pure flavour concentrates are only to be used as part of the e-liquid product that is vaporised by electronic cigarettes. The concentrate has to be diluted with Propylene Glycol, and, or Vegetable Glycerine. The addition of diluted nicotine base can be added if required.Recommended steeping time for all DIY mixed juice is from 3 – 5 days. Please store in a safe and dark space, when steeping and not using.Make sure that you always use protective clothing, spectacles and gloves when handling these, or any additional e-cig DIY products.